Practical Performance Comparison of 1-D and 2-D Decoding Methods for a Chipless RFID System in a Real Environment

Raphael Tavares de Alencar (1, 2) , Zeshan Ali (1, 2) , Nicolas Barbot (1, 2) , Marco Garbati , Etienne Perret (1, 2)

1 LCIS - Laboratoire de Conception et d'Intégration des Systèmes
2 ORSYS - Systèmes Optoélectroniques et Radiofréquences

A comparison of four decoding methods for a Chipless RFID system was executed by analyzing the read success rate of a frequency-position coding tag with 12-bit of capacity. Scattering parameter measurements have been performed in a real environment, using a fixed antenna, with the tag moving within a 30×30×30 cm 3 volume. Optimal parameters have been obtained based on the decoding success rates of the practical measurements, for background calibration, time-gating, Short Time Fourier Transform (STFT) and Short Time Prony Analysis (STPA) methods. STFT and time-gating showed the best volume reading performance. Time-gating has been found to be the best decoding method for the chipless RFID system employed, as it presented the best performance amongst the other methods while being a less complex, 1-D, approach.

Mots clés: Chipless RFID; Measurement; Prony; RCS; Reading Volume; Spectrogram; STFT; Tag Characterization; Time-Gating; UWB

Domaines: Traitement du signal et de l'image [eess.SP]

Raphael Tavares de Alencar, Zeshan Ali, Nicolas Barbot, Marco Garbati, Etienne Perret. Practical Performance Comparison of 1-D and 2-D Decoding Methods for a Chipless RFID System in a Real Environment. IEEE Journal of Radio Frequency Identification, 2020, 4 (4), pp.532-544. ⟨10.1109/JRFID.2020.2997988⟩. ⟨hal-03450581⟩